:root{--bg-color: #0a0a0f;--panel-bg: rgba(255, 255, 255, .03);--panel-border: rgba(255, 255, 255, .08);--text-primary: #ffffff;--text-secondary: rgba(255, 255, 255, .6);--accent-color: #6366f1;--accent-hover: #4f46e5;--danger-color: #ef4444;--success-color: #10b981;--board-dark: #475569;--board-light: #cbd5e1;--board-active: rgba(99, 102, 241, .6);--board-move: rgba(16, 185, 129, .5);--board-attack: rgba(239, 68, 68, .6);--board-check: rgba(239, 68, 68, .9)}body{margin:0;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background-color:var(--bg-color);background-image:radial-gradient(circle at 15% 50%,rgba(99,102,241,.08),transparent 25%),radial-gradient(circle at 85% 30%,rgba(139,92,246,.08),transparent 25%);background-attachment:fixed;color:var(--text-primary);min-height:100vh}code{font-family:source-code-pro,Menlo,Monaco,Consolas,Courier New,monospace}.glass-panel{background:var(--panel-bg);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border:1px solid var(--panel-border);box-shadow:0 4px 30px #0000001a;border-radius:16px}h1,h2,h3,h4,h5,h6{font-family:Playfair Display,serif;margin-top:0}.heading-gradient{background:linear-gradient(135deg,#fff,#a5b4fc);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}::-webkit-scrollbar{width:8px}::-webkit-scrollbar-track{background:var(--bg-color)}::-webkit-scrollbar-thumb{background:#334155;border-radius:4px}::-webkit-scrollbar-thumb:hover{background:#475569}.App{min-height:100vh;display:flex;flex-direction:column}.App-header{padding:2rem 0;text-align:center}.game-container{max-width:1200px;margin:0 auto;padding:2rem;display:flex;flex-direction:row;align-items:center;justify-content:center;gap:4rem}.header-heading{font-size:3.5rem;margin-bottom:2rem;text-align:center;letter-spacing:-.02em}.chessboard-container{display:flex;justify-content:center;position:relative;padding:12px;background:linear-gradient(145deg,#1e293b,#0f172a);border-radius:8px;box-shadow:0 25px 50px -12px #00000080,0 0 0 1px #ffffff1a,inset 0 1px #ffffff1a}.chessboard-inner-container{border:2px solid #0f172a;border-radius:4px;overflow:hidden;box-shadow:inset 0 0 20px #00000080}.chessboard-row{display:grid;grid-template-columns:repeat(8,1fr)}.chessboard-rotated,.chessboard-rotated .chessboard-row{transform:rotate(180deg)}.chessboard-square{position:relative;display:flex;justify-content:center;align-items:center;height:5rem;width:5rem;cursor:pointer;box-sizing:border-box;transition:all .2s ease}.chess-piece{filter:drop-shadow(0 4px 6px rgba(0,0,0,.4));transition:transform .2s cubic-bezier(.175,.885,.32,1.275);z-index:10;width:80%;height:80%}.chessboard-square:hover .chess-piece{transform:scale(1.1) translateY(-2px)}.dark-square{background-color:var(--board-dark);color:var(--board-light)}.light-square{background-color:var(--board-light);color:var(--board-dark)}.col-symbol,.row-symbol{position:absolute;font-size:.75rem;font-weight:600;font-family:Inter,sans-serif;opacity:.7;pointer-events:none;z-index:5}.col-symbol{top:.25rem;left:.25rem}.row-symbol{bottom:.25rem;right:.25rem}.active-square:after{content:"";position:absolute;top:0;right:0;bottom:0;left:0;background-color:var(--board-active);z-index:1}.moveable-square:after{content:"";position:absolute;background-color:var(--board-move);width:30%;height:30%;border-radius:50%;z-index:1;box-shadow:0 0 10px var(--board-move)}.attack-square:after{content:"";position:absolute;top:0;right:0;bottom:0;left:0;background-color:var(--board-attack);z-index:1;box-shadow:inset 0 0 20px #0000004d}.king-check-square:after{content:"";position:absolute;top:0;right:0;bottom:0;left:0;background:radial-gradient(circle,transparent 20%,var(--board-check) 100%);z-index:1;animation:pulse-danger 1.5s infinite}@keyframes pulse-danger{0%{box-shadow:inset 0 0 #ef4444b3}70%{box-shadow:inset 0 0 0 10px #ef444400}to{box-shadow:inset 0 0 #ef444400}}.game-controls-panel{display:flex;flex-direction:column;gap:2rem;padding:2.5rem;min-width:300px}.game-info{text-align:center}.game-info h2{font-size:1.5rem;color:var(--text-secondary);margin-bottom:.5rem;font-family:Inter,sans-serif;font-weight:500}.status-badge{display:inline-block;padding:.5rem 1rem;border-radius:9999px;font-size:.875rem;font-weight:600;letter-spacing:.05em;text-transform:uppercase}.status-badge.waiting{background:#f59e0b33;color:#fbbf24;border:1px solid rgba(245,158,11,.3)}.status-badge.playing{background:#10b98133;color:#34d399;border:1px solid rgba(16,185,129,.3)}.game-btn-div{display:flex;flex-direction:column;gap:1rem}.game-btn{padding:1rem 2rem;font-size:1.125rem;font-weight:600;font-family:Inter,sans-serif;color:#fff;background:var(--accent-color);border:border: 1px solid rgba(255,255,255,.1);border-radius:8px;cursor:pointer;transition:all .2s;box-shadow:0 4px 6px -1px #0000001a,0 2px 4px -1px #0000000f}.game-btn:hover:not(:disabled){background:var(--accent-hover);transform:translateY(-2px);box-shadow:0 10px 15px -3px #0003,0 4px 6px -2px #0000001a}.game-btn:active:not(:disabled){transform:translateY(0)}.disabled-btn{background:#334155;color:#94a3b8;cursor:not-allowed;opacity:.7}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#0009;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);display:flex;justify-content:center;align-items:center;z-index:1000;opacity:0;pointer-events:none;transition:opacity .3s ease}.modal-open{opacity:1;pointer-events:auto}.game-start-modal-content{text-align:center;padding:3rem;max-width:400px;transform:scale(.9);transition:transform .3s cubic-bezier(.175,.885,.32,1.275)}.modal-open .game-start-modal-content{transform:scale(1)}.game-start-modal-content h2{font-size:2.5rem;margin-bottom:1rem;color:#fff}.game-start-modal-content h3{font-size:1.5rem;color:var(--accent-color);margin-bottom:1rem}.game-start-modal-content p{color:var(--text-secondary);margin-bottom:2rem;font-size:1.125rem}.game-start-modal-content button{width:100%}@media(max-width:1080px){.game-container{flex-direction:column;padding:1rem;gap:2rem}}@media(max-width:680px){.chessboard-square{height:calc(100vw / 9);width:calc(100vw / 9)}.game-controls-panel{min-width:100%;padding:1.5rem}}